Study

Revegetation strategies for Kaho'olawe Island, Hawaii

  • Published source details Warren S.D. & Aschmann S.G. (1993) Revegetation strategies for Kaho'olawe Island, Hawaii. Journal of Range Management, 46, 462-466.

Actions

This study is summarised as evidence for the following.

Action Category

Use erosion blanket after seeding/planting

Action Link
Grassland Conservation

Add fertilizer to soil before or after seeding/planting

Action Link
Grassland Conservation
  1. Use erosion blanket after seeding/planting

    A replicated, paired, controlled study in 1988–1991 in a largely unvegetated area on the island of Kahoʻolawe, USA (Warren & Aschmann 1993) found that using an erosion blanket after sowing seeds did not alter vegetation cover compared to seeding alone. After 25 months, average vegetation cover did not differ between sown plots with or without an erosion blanket (both 3%). In November 1988, the site was ploughed to a depth of 10 cm. In December 1988, seeds (a mix of six grasses and one legume) were sown using a seed drill in two 60 x 1.8 m plots in each of five blocks. One plot/block was covered with woven jute netting, and the other plot was left uncovered. In January 1991, thirty 0.25-m2 quadrats were placed in each plot and vegetation cover estimated by eye.

     

    (Summarised by: Anna Berthinussen)

  2. Add fertilizer to soil before or after seeding/planting

    A replicated, paired, controlled study in 1988–1991 in a largely unvegetated area on the island of Kahoʻolawe, USA (Warren & Aschmann 1993) found that adding fertilizer and sowing seeds increased vegetation cover compared to sowing without fertilizer. After 25 months, average vegetation cover was higher in plots where fertilizer was added and seeds sown (9–48%) than in plots where seeds were sown without fertilizer (3%). Plots where rates of fertilizer addition were higher also had greater vegetation cover (see original paper for details). In November 1988, the site was ploughed to a depth of 10 cm. In four 60 x 1.8 m plots in each of five blocks, fertilizer was added at three different rates and seeds (a mix of six grasses and one legume) were sown using a seed drill in. Seeds were sown without fertilizer in one plot/block. In January 1991, thirty 0.25-m2 quadrats were placed in each plot and vegetation cover estimated by eye.

     

    (Summarised by: Philip Martin)

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